Feliks Audio Envy, released in 2021, was our first flagship output transformer-coupled headphone amplifier, seeing its debut at the High End Munich 2022. That is exactly when the Feliks Audio Envy and Hifiman Susvara pairing was first introduced, and immediately, we knew that we were dealing with one of the greatest pairings in the headphone realm. The Envy’s immense 8 Watts of Class-A power was the perfect match for the Hifiman Susvara, to this day one of the most demanding pairs of headphones on the market.

Since then, the original Envy has become one of the headphone community’s favorite amplifiers, winning community awards to this day. With time, more versions of the Envy have been released – initially, there were the Basic and Performance editions, then, to celebrate the company’s 25th anniversary, a very limited and technically sophisticated, black piano Envy Anniversary Edition came out, becoming a benchmark for high-end headphone amplifiers. In 2025, the latest of the Envy came out – the Envy Susvara Edition.

“The Feliks Envy Performance was already an impressive summit-fi headphone amplifier. With Envy Susvara Edition, they brought it to a completely different level.” – Ear Fidelity

Picking the right 300B tube

Picking the right 300B tube to unleash your amplifier’s full potential is no simple task. That is why the Envy Susvara Edition comes with some of the finest 300B tubes available – the Stradi S300B. This carefully matched premium 300B tube provides a great frequency response and a precise, detailed, and airy sound signature. This arrangement results in the most technical and detailed presentation achievable with your favorite headphones. Envy Susvara Edition is compatible with any 300B power tubes that have a standard filament voltage of 5 Volts, allowing you to tailor the amplifier’s sound to your specific needs.

Apart from the power tubes and transformers, several signal-critical components, like capacitors or resistors, have also been upgraded, matching the Envy 25th Anniversary Edition. Through the use of high-precision components from brands like Jantzen, Vishay, Nichicon, or Dale, we were able to maximize signal clarity and reproducibility. Additionally, thanks to improved signal wiring, better internal interference handling has been achieved through a number of modifications.

We have decided to leave no stone

We have decided to leave no stone unturned when designing the Envy Susvara Edition, even on the micro scale – several tweaks have been made to ensure stabilization of tube parameters and enhance protection for tube-related failures. The pre-amp output has also been modified and optimized to reduce noise levels and adapt the construction to higher signal levels. The improvements introduced with the Envy Susvara Edition are many – large or small – and many of them stem from the lessons we learned thanks to the feedback of our customers.

Envy Susvara Edition sports a similar design to the Envy Anniversary Edition, with the main difference being the use of solid wood instead of a black piano finish. The luxurious wood finish is synonymous with the philosophy of Feliks Audio – crafted to perfection, for a true definition of endgame-quality audio. By default, the Susvara Edition is available in Wenge wood, but other finish options are available on request – ask your local Feliks Audio dealer about availability

Feliks Audio Envy Susvara Edition is the result of years of development, research, and community feedback, designed to be the ultimate pairing for your headphones’ power demands. Feliks Audio Envy and Hifiman Susvara headphones are a beloved pairing in the audio community, and the Envy Susvara Edition is a testament to its greatness, tailor-made to suit not just the Susvara itself but to be a perfect companion for any demanding headphone on the market. Crafted by hand in Lubliniec, in the Silesia region of southern Poland, each unit carries its own DNA and a unique soul, thanks to in-house mastery that enables us to reach perfection with every manufactured unit.